Malaysian authorities told Reuters on Tuesday that a North Korean man had died on the way to a hospital from Kuala Lumpur airport on Monday. Officials did not immediately confirm his identity, but an employee at an emergency ward at Putrajaya hospital “said a deceased Korean there was born in 1970 and surnamed Kim,” Reuters reported.

Kim Jong Nam and Kim Jong Un had different mothers and were sons of former North Korean leader Kim Jong Il. The former leader died in 2011.

Kim Jong Nam was once considered Kim Jong Il’s heir before a scandal broke in 2001 that is believed to have “hobbled his chances,” The New York Times reported. He was caught that year trying to take his son to Tokyo Disneyland in Japan while using a fake visa, according to the newspaper.

He was deported to China and estranged from his family.

He was believed to be close to his uncle, Jang Song Thaek, according to Reuters. Jang was a leading figure in North Korea before he was executed on Kim Jong Un’s orders in 2013 for planning a military coup.